ARRT category · 12% of exam
Equipment Operation and Quality Assurance
Tests x-ray tube anatomy, photon production, the x-ray circuit, fluoroscopy equipment, image intensifiers, and the QC tolerance schedule. Approximately 12% of the ARRT exam.
Sample question
One free question from the 93-question Equipment QA bank. Read it, pick your answer, then expand the rationale.
Annual QC testing reveals that a generator set to 100 kVp is producing an actual peak voltage of 93 kVp. Is this within the acceptable tolerance?
Show answer and full rationale
Correct answer: B. No, the kVp is too low, accuracy tolerance is ±5%
A, Incorrect: kVp tolerance is ±5%, not ±10%.
B, Correct: Correct. The kVp accuracy tolerance is ±5% of the indicated value. A 100 kVp setting must produce 95–105 kVp actual. 93 kVp is below the lower limit and the generator must be serviced.
C, Incorrect: kVp tolerance is ±5%, not ±15%. ±15% is the threshold for the 15% density rule, not QC.
D, Incorrect: kVp tolerance is ±5%, not ±2%. Timer tolerance is also ±5%.
Topics tested in this category
- Cathode and anode anatomy
- Thermionic emission and electron flow
- Bremsstrahlung and characteristic radiation
- Heat units and tube cooling
- The anode heel effect
- Transformers (autotransformer, step-up, step-down)
- Rectification and ripple
- Image intensifier and brightness gain
- QC tolerances (kVp ±5%, timer ±5%)
Drill the full 93-question bank.
Free tier includes 50 mixed-category questions. Premium unlocks all 1,814 ARRT-style questions, 3 timed mock exams, and adaptive drill sessions in this category.
Frequently asked questions
How many Equipment QA questions are on the ARRT Radiography Boards?
The Equipment Operation and Quality Assurance category accounts for approximately 12% of the ARRT Radiography Boards exam, that's roughly 24 of the 200 scored questions on each administration. The full Radtechprepper practice bank contains 93 questions in this category, giving you ample room to drill until the patterns are second nature.
What topics are tested in the Equipment QA category?
The Equipment QA category tests: Cathode and anode anatomy; Thermionic emission and electron flow; Bremsstrahlung and characteristic radiation; Heat units and tube cooling; The anode heel effect. The full topic list is in the ARRT Radiography Content Specifications 2025.
How should I study for the Equipment QA category?
Start with the chapter overviews in this curriculum that map to Equipment QA, they cover the core concepts in plain English. Then drill questions in the practice bank, pause on every miss, read the rationale, and re-drill the same topic the next day. The ARRT exam rewards spaced repetition more than cram studying.